On Wed, May 21, 2008 at 7:28 AM, bilal ghayyad <[EMAIL PROTECTED]> wrote: > Dears; > > I do not know if any had experience in using speex or > ilbc with IAX and got good results, because I am > facing a problem with GSM. > > I am facing a noise problem when I am using GSM with > IAX trunk as following: > > IP Phone (G711) ---> Local Asterisk Box ---> IAX Trunk > using GSM codec ---> Remote Asterisk Box ---> Digium > Card (FXO) to terminate the call to the destination > > While no noise happen if that senario is happening: > > IP Phone (G711) ---> Local Asterisk Box ---> IAX Trunk > using GSM codec ---> Remote Asterisk Box ---> Digium > Card (FXS) to an extension > > I tried to use GSM with IAX trunk, and actually I got > a problem that: when I am using IP Phone (Polycom 320, > with G711 codec) and placed a call, that call will go > via the IAX trunk to the remote Asterisk Box, then > using the Digium TDM22B card to terminate the call via > the PSTN analoge lines, there is a noise coming with > the voice! This noise does not appear if we do not use > the "IAX trunk and if the call is not going to be > terminated via the Digium Card (FXO) on the remote > Asterisk Box (if we use IAX trunk and we call an > extension (FXS) on a remote Asterisk but not the PSTN > and the FXO on the remote Asterisk, then no noise > appear). > > So the noise happen only in that senario: > > IP Phone (G711) ---> Local Asterisk Box ---> IAX Trunk > using GSM codec ---> Remote Asterisk Box ---> Digium > Card (FXO) to terminate the call to the destination > > While no noise happen if that senario is happening: > > IP Phone (G711) ---> Local Asterisk Box ---> IAX Trunk > using GSM codec ---> Remote Asterisk Box ---> Digium > Card (FXS) to an extension > > I do not know if it is a matter of the GSM codec, or > if it is related to the digium card that it is the old > model. > > But any one can advise if speex or ilbc will give > better performance than GSM with IAX trunk? > > Any advise? > Regards > Bilal > > -------------------- > bilal ghayyad wrote: >> Hi List; >> >> Anyone tried to use speex, ilbc and g729 and come > back >> with a preferred one in the quality? >> >> Regards >> Bilal >> >> >> > > ____________________________________________________________________________________ >> Never miss a thing. Make Yahoo your home page. >> http://www.yahoo.com/r/hs >> >> _______________________________________________ >> -- Bandwidth and Colocation Provided by > http://www.api-digital.com -- >> >> asterisk-users mailing list >> To UNSUBSCRIBE or update options visit: >> > http://lists.digium.com/mailman/listinfo/asterisk-users >> > Depends on what you're using it for. We've had > excellent luck with > iLBC > for voice quality and g729 as well. Speex is better > than GSM, but not > spectacularly. > > The problem with all of them of course, is > transcoding. They have less > of a bandwidth footprint for acceptable quality, but > more of a > processor > footprint. > > N. >
I would check the "old" digium card first. Check interrupts and all. Describe the "noise". I am inclined to to think it is a hardware issue since it only exhibits itself when using the Digium card. Thanks, Steve Totaro _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
